Every genuine on/off toggle already agreed on ON/OFF, but the disabled
point of several value pickers didn't: Settings' LowBat/GPS pwr/e-ink
full-refresh options and the auto-advert interval showed lowercase
"off", GPIO's mode row showed "Off" right above its own State row's
"OFF", and the GPS-averaging/trail-autopause pickers showed "Off" where
the alarm-repeat picker already said "OFF". All display-only label
arrays, no behaviour change.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>